Find Outside Array

You are given an array $A$ of size $N$. You want to find an integer that is not present in the array $A$. Unfortunately, you only know addition of $2$ numbers. So you will try to find an integer of the form $X = A_i + A_j$ ($1 \le i, j \le N$), such that $X$ does not appear in the array $A$. If it is possible to find such an integer, print $A_i$ and $A_j$. Here, $A_i$ may be equal to $A_j$, and